During World War II, amid a gasoline shortage, many European commuters had to improvise, often resorting to installing clunky power generators that converted wood into fuel for their engines. (Check out this rig!) But once fossil fuels were readily available again, these briefly popular machines were, for the most part, tossed into the dustbin of history.

Today, in a renovated former artists’ space in Berkeley, an alternative energy startup, has slowly begun resurrecting this more than century-old technology known as gasification. Over the course of five years, All Power Labs has sold over 500 made-to-order versions of their signature invention, a $27,000 refrigerator-sized biomass-converting device called the “Power Pallet.” Customers, most of whom reside in poorer countries like Ecuador, Haiti, Thailand and Nicaragua, obviously are drawn to the fact that the contraptions can generate clean burning fuel for about 10 cents per kilowatt hour, about one-sixth of what power companies typically charge. But that’s not the only perk.

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